Anyone know why licenses are written in a way that requires such a drastic end? Physical products produced under license don't cease to exist - ever - unless someone destroys them. It doesn't seem to bother anyone or hurt the companies which permitted their IP to be used. I can't see why digital licenses can't be written to similarly allow products to exist into perpetuity once created.

There has to be a better way. Shortsightedness in contract language, or some legitimate obstacle I wouldn't be aware of?